Open AccessAnalytical design of athermal ultra-compact concentric catadioptric imaging spectrometer
Author(s) -
Jian Feng Zhu,
Weimin Shen
Publication year - 2019
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.031094
Subject(s) - catadioptric system , optics , concentric , aperture (computer memory) , lens (geology) , spectrometer , achromatic lens , image quality , materials science , physics , computer science , acoustics , geometry , mathematics , artificial intelligence , image (mathematics)
An ultra-compact concentric catadioptric imaging spectrometer with large relative aperture and long slit is proposed. It consists of three optical components integrated monolithically in a concentric layout. Its astigmatism theory is discussed through tracing its chief ray and its athermalization is realized by optimizing lens materials. A high-speed (F/2.25) long-slit (48mm) VNIR design with high imaging quality and small distortions is presented. Results show a 10× reduction in volume than classic designs based on Offner-Chrisp configuration and a 1.9× reduction in length than Dyson configuration. Moreover, the design shows superior thermal adaptability with negligible decline in imaging quality while operating temperature changes between -30 ℃ and 70 ℃.